Lost continuity to UEXT on just GPI36?

[KeviNH]

We are using Serial1 and I2C via the UEXT connector on ESP32-POE-16MB.   

Yesterday on one device, Serial1 stopped responding.   Checked our connections and we have continuity through to our UEXT jumper.

Checked the ESP32-POE-16MB board itself, and there is no continuity for GPI36 between EXT (board edge pin header) and the corresponding UEXT pin!   All other GPIO's found on both show continuity, just not this one pin.

Has anybody else experienced a similar issue?   We had an unexplained failure a while back on an ESP32-POE which might also have a similar fault, we had a spare for that one and so just swapped it out without a lot of diagnosis.

[LubOlimex]

So far there are no signs of hardware issue.

"Checked the ESP32-POE-16MB board itself, and there is no continuity for GPI36 between EXT (board edge pin header) and the corresponding UEXT pin!   All other GPIO's found on both show continuity, just not this one pin."

The is expected. There is diode on the GPI36 near the UEXT that leads to this behavior. Refer to the schematic.

Just to confirm it myself I tried to beep GPI36 at pads of UEXT and EXT2 on few boards here and surely there is no beep here either.